tdf#42949 Fix IWYU warnings in include/i18nutil/*

Found with bin/find-unneeded-includes
Only removal proposals are dealt with here.

Change-Id: Icc3cb8118b225c9b19b451b2a6463c844ef4162d
Reviewed-on: https://gerrit.libreoffice.org/62459
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

i18nutil/source/utility/casefolding.cxx

@@ -19,8 +19,11 @@
 
 #include <i18nutil/casefolding.hxx>
 #include "casefolding_data.h"
+#include <i18nutil/oneToOneMapping.hxx>
 #include <i18nutil/widthfolding.hxx>
 #include <i18nutil/transliteration.hxx>
+#include <com/sun/star/lang/Locale.hpp>
+#include <com/sun/star/uno/RuntimeException.hpp>
 
 using namespace com::sun::star::lang;
 using namespace com::sun::star::uno;

i18nutil/source/utility/oneToOneMapping.cxx

@@ -18,6 +18,7 @@
  */
 
 #include <i18nutil/oneToOneMapping.hxx>
+#include <string.h>
 
 namespace i18nutil {
 

i18nutil/source/utility/paper.cxx

@@ -30,6 +30,7 @@
 #include <utility>
 #include <cstdlib>
 #include <unotools/configmgr.hxx>
+#include <com/sun/star/lang/Locale.hpp>
 
 #ifdef UNX
 #include <stdio.h>

i18nutil/source/utility/widthfolding.cxx

@@ -18,6 +18,7 @@
  */
 
 #include <i18nutil/widthfolding.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
 #include "widthfolding_data.h"
 
 using namespace com::sun::star::uno;

include/IwyuFilter_include.yaml

@@ -278,3 +278,9 @@ blacklist:
     - com/sun/star/lang/XInitialization.hpp
     - com/sun/star/lang/XServiceInfo.hpp
     - com/sun/star/xml/sax/XFastParser.hpp
+    include/i18nutil/casefolding.hxx:
+    # Needed for template
+    - o3tl/typed_flags_set.hxx
+    include/i18nutil/transliteration.hxx:
+    # Needed for template
+    - o3tl/typed_flags_set.hxx

include/i18nutil/casefolding.hxx

@@ -20,11 +20,11 @@
 #define INCLUDED_I18NUTIL_CASEFOLDING_HXX
 
 #include <sal/types.h>
-#include <com/sun/star/lang/Locale.hpp>
-#include <com/sun/star/uno/RuntimeException.hpp>
 #include <i18nutil/i18nutildllapi.h>
 #include <o3tl/typed_flags_set.hxx>
 
+namespace com { namespace sun { namespace star { namespace lang { struct Locale; } } } }
+
 enum class TransliterationFlags;
 
 enum class MappingType {

include/i18nutil/oneToOneMapping.hxx

@@ -19,14 +19,11 @@
 #ifndef INCLUDED_I18NUTIL_ONETOONEMAPPING_HXX
 #define INCLUDED_I18NUTIL_ONETOONEMAPPING_HXX
 
-#include <rtl/ustring.hxx>
 #include <i18nutil/i18nutildllapi.h>
 #include <memory>
 
 namespace i18nutil {
 
-class widthfolding;
-
 struct OneToOneMappingTable_t
 {
     sal_Unicode first;

include/i18nutil/paper.hxx

@@ -22,7 +22,8 @@
 
 #include <i18nutil/i18nutildllapi.h>
 #include <rtl/string.hxx>
-#include <com/sun/star/lang/Locale.hpp>
+
+namespace com { namespace sun { namespace star { namespace lang { struct Locale; } } } }
 
 //!! The values of the following enumerators must correspond to the array position
 //!! of the respective paper size in the file i18nutil/source/utility/paper.cxx

include/i18nutil/searchopt.hxx

@@ -23,7 +23,6 @@
 #include <com/sun/star/lang/Locale.hpp>
 #include <com/sun/star/util/SearchAlgorithms.hpp>
 #include <com/sun/star/util/SearchOptions2.hpp>
-#include <i18nutil/i18nutildllapi.h>
 #include <i18nutil/transliteration.hxx>
 
 namespace i18nutil

include/i18nutil/transliteration.hxx

@@ -19,7 +19,6 @@
 #ifndef INCLUDED_I18NUTIL_TRANSLITERATION_HXX
 #define INCLUDED_I18NUTIL_TRANSLITERATION_HXX
 
-#include <sal/types.h>
 #include <com/sun/star/i18n/TransliterationModules.hpp>
 #include <com/sun/star/i18n/TransliterationModulesExtra.hpp>
 #include <o3tl/typed_flags_set.hxx>

include/i18nutil/widthfolding.hxx

@@ -20,10 +20,12 @@
 #define INCLUDED_I18NUTIL_WIDTHFOLDING_HXX
 
 #include <sal/types.h>
-#include <com/sun/star/uno/Sequence.hxx>
-#include <i18nutil/oneToOneMapping.hxx>
+#include <rtl/ustring.hxx>
 #include <i18nutil/i18nutildllapi.h>
 
+namespace com { namespace sun { namespace star { namespace uno { template <typename > class Sequence; } } } }
+namespace i18nutil { class oneToOneMapping; }
+
 namespace i18nutil {
 
 #define WIDTHFOLDNIG_DONT_USE_COMBINED_VU 0x01